Whirling Disease Molly. Whirling disease is a parasitic infection of fish caused by a microscopic protozoan that destroys the cartilage of juvenile trout, resulting in skeletal deformities and sometimes whirling behavior. Fake plants since baby likes greens a lil too much.
Fish symptoms (include full description including lesion, color, location, fish behavior): Equipment:1 10 watt cf + 2 25 watt inc., temporary stock: This is what causes the uncontrolable whirling movements.